Sewing-machine



W. L. BARRON AND F. E. OSOL.

' SEWING MACHINE.

APPLICATION FILED NOV. 23, 1915.

a I f I 1 WITNESSES: A m g 1125M 7 m M ATTORNEY UNITED STATES PATENT OFFICE.

WILLIAM I!- BARRON, OF NEVT YORK. N. Y., AND FRITZ E. OSOL, OF ELIZABETH, NEW

JERSEY, ASSIGNORS TO THE SINGER MANUFACTURING COMPANY, A CORPORA- TIOLTOF NEW JERSEY.

Specification of Letters Patent.

SEWING-MACHINE.

Patented Aug. 30, 1921.

Application filed November 23, 1915. Serial No. 62,951.

To all whom it may concern:

Be it known that we, lVrLmi-iir L. BARRON and FRITZ E. OsoL, citizens of the United States, residing at New York, in the county of New York and State of New York, and Elizabeth, in the county of Union and State of New Jersey, respectively, have invented certain new and useful Improvements in Sewing-Machines, of which the following is a specification, reference being had therein to the accompanying drawings.

This invention has for its object to provide simple and effective mechanism for laying a coverin thread transversely in advance of a plurality of reciprocating needles in the formation of an ornamental seam similar to that shown in the United States patent to Joseph Berger, No. 1,060,526, of April 29, 1913.

The preferred form of the present improvement is embodied in a multiple needle chainstitch machine comprising a plurality of thread carrying needles cooperating with a single reciprocating thread-carrying looper operating beneath the work-plate.

The covering threadmechanism is mounted upon the presser-bar and comprises a thread-carrying implement adapted for movement at one side only of the line of scam and substantially parallel with the line of feed, and a spreader or looping finger arranged for movement across the line of seam, these implements traversing intersecting paths, one of which is rectilinear and the other arcuate. Mounted for movement upon the presser-bar is a reciprocating member provided with an arm to which is rigidly secured the thread-carrying implement. Fulcrumed upon the presserbar is a rocker to one arm of which is rigidly face-plate removed and the throat-plate in section. Fig. 2 is a perspective view showing the needles and covering-thread mechanism. Fig. 3 is a detail perspective view of the rocker carrying the spreader and its linkcon11ection with the reciprocating member, and Figstand5 are perspective views illustrating the method of cooperation of the thread-laying devices with the needles.

The machine is or may be'provided with a stitch-forming mechanism constructed substantially in accordance with the United States patent to WVilliam H. Hugg, No. 1,005,645, of October 10, 1911. It is.constructed with the usual base 1, and bracketarm comprising the hollow standard 2 and tubular overhanging arm, of which the head 3 only is shown, and in which is journaled the vertically reciprocating needle-bar 4 provided with the needle-clamp 5 carrying the two eye-point needles 6. The needle-actuating rock-shaft 7 journaled in the overhanging bracket arm carries at its forward end a collar 8 formed with a crank-arm 9 provided with a crank-pin 10 connected by means of the usual link 11 with a rearwardly projecting stud carried by the collar 12 clamped upon the needle-bar 4, through which connections the needles 6 receive their operative movements from the rock-shaft 7. Journaled upon the base 1, beneath the workplate is the looper-carrier 13 provided with the lower thread-carrying looper 14 which cooperates with the needles 6 in the forma tion of stitches, as fully described in the patent to Hugg before referred to.

Journaled in the bracket-arm head 3 is the presser-bar 15 normally pressed downward by a spring, of which only the end 16 is shown, and having secured near its lower end by means of the fastening screws 17, the bearing block 18, the reduced lower end of the presser-bar having secured thereon by means of the fastening screw 19 the usual presser-foot 20.

Adapted to slide within the support or bearing-block 18 is a rectilinearly reciprocating member 21 having an upwardly extending arm 22 apertured to receive a screwstud 28 upon which is journaled one end of an endwise-adjustable link 24 whose other end is pivotally connected to the depending arm of a rocker 25 journaled upon a screwstud 26 carried by the bracket 27 which is rigidly secured to the bracket-arm head 3 by the fastening screws 28. The lateral arm of the rocker 25 is connected by a bent link 29 with an eccentric stud 30 carried by the collar 8.

Projecting laterally from the reciprocating member 21 is a forwardly extending;- arm 31 to which is secured, by means of the transverse set-screw 32, the downwardly extending thread-carrying implement 33 which is formed with a rearwardly directed end having a covering-thread guiding aperture 3%: at its lower extremity. Fulcrumed on the screw-stud 35, depending from a flat seaton the under side of the bearing-block 18, is a rocker 86 whose rearwardly extending arm carries a pivotal pin 37 passing through one end of a link 38 whose other end is apertured to receive the screw-stud 39 depending from the rear end of the reciprocating member 21. Secured in a suitable socket on the free end of the rocker-arm 36 by means of the setscrew 10 is the spreaderarm 41 whose free end is formed with a suitable thread-hook 41:2 to engage and spread the covering-thread loop.

The link 88 thus constitutes a direct driving connection between the member 31 supporting the thread-carrying implement 33 and the rocker arm 36 supporting the spreader 41 and insures the maintenance of the correct relative timing of the thread handling implements one of which is suitably actuated by the driving element on the main-shaft.

In the use of the machine, the under thread looper is threaded in the usual man ner and the needle-threads a and Z) passed through the eyes of their respective needles 6. The covering-thread c is led from the sourceoi supply through a suitable tension (not shown) to a fixed thread-guide 48 upon the inner side of the bracket-arm head 8 from which it is led through the delivery aperture 84 of the thread-carrying implement 33. The material on having been in troduced between the presser-i'oot 19 and the throat-plate id, the machine is set in operatron.

During the descent of the needles (Fig. 1-), the spreader or looping finger 41 begins its retractive movement from advance or spreading position across the line of scam while the thread carrying implement o3 begins its forward movement parallel therewith the points of the needles having previously de scended below the covering thread leading from the implement to the work. As the needles 6 pass below the throat-plate dd and begin to rise to form their loops for seizure by the threaded loop-taker 14:, thethread carrying implement and the spreader 41 have reached their respective extreme retracted positions, and as they resume their advance movements, the spreader 4E1 engages and forms a loop in the covering thread 0 which it carries across the line of seam. Vhile the spreader is moved in this manner, the needles 6 are completing their ascent and the thread-carrying implement 83 begins itsreceding movement. During the rise of the needles, the thread-carrying implement 33 draws the covering thread 0 rant across the line of seam but at a slight angle thereto so that one of the needles will be in front of: the covering-thread while the other will be in its rear, the two implements acting in conjunction to hold and spread the cmrering thread 0 for passage of the needles in their succeeding descent.

As the stitching continues, the threadca-rrying implement and spreader continue to perform their reeiprocations, one in a rectilinear path at one side only and parallel with the line of seam and the other in an areuate path transversely thereto and across the line of scam, each receiving a to-and-fro movement for every reciprocation of the needles so that loops of covering thread are laid intermediate the needle-paths back and forth across the line of seam similar to that of the looper-thread upon the lower face of the fabric, the looper receiving the. usual endwise and sidewise movements in interlooping its thread withthe needle-threads. In the finished seannas represented in Figs. 4 and'5, loops of coveringthread 0 are laid alternately at opposite sides of the stitchline and each is entered by a thread-loop of the adjacent needle through both of which needle-thread loops is passed a loop of! looper'thread, not shown.

The machine is provided with any usual or suitable feeding mechanism and comprises the feed-rocker 45 operatively connected with the feed-bar 46 and provided with the feeddog 47 adapted to engage and advance the material through suitable slots in the throat eluding said reciprocating member for im-- parting movements to said thread-carrying nnplement, and a connection between said reciprocating member and said spreader for actuating the latter.

2. In stitch-forming.inechanism, the combination with a needle and means for reciprocating the same, of a reciprocating memher and thread-laying means comprising two cooperative thread-laying implements, one movable upon a substantially fixed fulcrum across the line of seam and the other mounted upon said reciprocating member and confined to movement at one side of the line of scam, means including said reciprocating member for imparting movements to one of said thread-laying implements, and a connection between said reciprocating member and the other thread-laying implement for actuating the latter.

3. In stitch-forming mechanism, the combination with a needle and means for reciprocating the same, of a presser-bar, a movable member mounted upon said presserbar, a thread-carrying implement mounted upon said movable member and confined to movement at one side of the line of scam, a

rocker journaled upon said presser-bar and having operative connections with said movable member, a spreader carried by said rocker and adapted for movement across the line of seam, and means including said movable member for imparting movements to said thread-laying implement and spreader.

4. In stitclrtorming mechanism, the combination with a needle and means for reciprocating the same, of a presser-bar, a reciprocating member movably mounted upon said presser-bar, a thread-carrying implement mounted upon said reciprocating memher, a spreader fulcrumed upon said presserbar and having operative connection With said reciprocating member to move said spreader across the line of seam, and means for imparting movements to said thread-laying implement and spreader.

5. In stitch-forming mechanism, the combination with a needle, a rock-shaft, connections between said rock-shaft and the needle for operating the latter, of a presser-bar, a rectilinearly reciprocating member movably mounted upon said presser-bar, operative connections between said rock-shaft and said reciprocating member, and a thread-carrying implement and a spreader operatively connected with said reciprocating member.

6. In stitch-forming mechanism, the combination with a needle, a rock-shaft, connections between said rock-shaft and the needle for operating the latter, of a presser-bar, a rectilinearly reciprocating member movably mounted upon said presser-bar, operative connections between said rock-shaft and said reciprocating member, and a thread-carrying imp ement and a spreader operatively con nected with said reciprocating member, one of which is mounted upon the reciprocating member and the other mounted independently thereof.

7. In a sewing machine, in combination, a reciprocating needle, an actuating shaft therefor, a pair of thread-handling implements cooperating with one another to lay a covering thread across the line of scam, one of said implements being mounted for movement across the line of seam and the other of said implements being mounted for movement on one side only of said line of scam, a movable support for one of said implements, means for actuating said support from said shaft, a support for the other implement, and a connection independent 01": said actuating means between the movable support and the support for the other implement for actuating the latter.

8. In a sewing machine, in combination, stitch forming mechanism comprising a needle and means for reciprocating the same, a covering thread-carrier, a movable support therefor, means for reciprocating said support'to move said carrier at one side only of the line of seam, and a looping finger movable across the line of seam and cooperating with said thread-carrier to lay its covering thread across the line of seam, said looping finger being connected with and actuated by said support.

9. In a sewing machine, in combination, stitch forming mechanism comprising a needle and means for reciprocating the same, a presser-bar, a covering thread-carrier sustained by the presser-bar and confined to a path of movement at one side only of and substantially parallel with the line of scam, a support therefor, means for reciprocating said support, and a looping finger actuated by the support for said thread-carrier and 00- operating therewith to laya covering thread across the line of seam.

10. Ina sewing machine, in combination, a reciprocating needle-bar carrying a plurality of needles arranged in a plane transverse to the direction of feed, means to reciprocate said needle-bar, an'embroiderythread carrier movable in a path substantially parallel with the direction of feed, a reciprocating support therefor, means for reclprocatlng said support, and a cooperating looping finger movable in a path transverse to the movements of said carrier and actuated from said support.

11. The combination with a work-support, a feed, a presser-foot, a presser-bar, needles and complemental stitch-forming mechanism, of a covering thread mechanism ineluding a thread-carrying implement, a support mounted upon the presser-bar and movable up and down therewith, a reciprocating member mounted in said support, a threadcarrying implement mounted upon said reciprocating member, an actuating shaft, connections between the actuating shaft and the reciprocating member for imparting opera tive movements to the latter, a spreader pivotally mounted upon said support and cooperating with said thread-carrying implement, and a direct connection between said reciprocating member and said spreader for actuating the latter.

12. The combination of a Work-support, a feed, a presser-foot, a presser-bar carryin said presser-foot and covering thread mechanism including a thread-carrying implement movable in a direction substantially parallel with the line of feed, a spreader cooperating therewith and movable in a direction substantially at right angles to the line of feed, means for supporting said thread-carrying implement and spreader on the resser-bar whereby the same are moved up and down therewith through the action of the feed on the presser-foot and for removing and inserting the work, a reciprocating member upon which one thread handling element of the covering thread mechanism is mounted, actuating means for said reciprocating member, and a connection independent of said actuating means between the reciprocating member and the other thread-handling element for actuating the latter.

13. The combination with a work-support, a feed, a presser-foot, a presser-bar, needles, and complemental stitch-forming mechanism, of a covering thread mechanism including a thread-carrying implement movable in a direction substantially parallel with the line of feed, a spreader cooperating therewith, a reciprocatory member movable up and down with the presser-bar, actuating means for said reciprocating member, and devices connected with said reciprocating member independently of said actuating means for actuating said thread-carrying implement and spreader.

In testimony whereof, we have signed our names to this specification.

WILLIAM L. BARRON. FRITZ E. OSOL. 

